Plant Sexual Reproduction
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Questions and Answers

¿Cuál es la función del órgano especializado en la copulación en el macho?

  • Liberar los gametos sexuales en el medio
  • Depositar los gametos femeninos en el cuerpo del macho
  • Regular el ciclo reproductivo
  • Depositar los gametos masculinos en el cuerpo de la hembra (correct)

¿Qué tipo de fecundación ocurre en los animales acuáticos?

  • Desarrollo directo
  • Fecundación interna
  • Fecundación externa (correct)
  • Desarrollo indirecto

¿Cuál es la diferencia entre los organismos vivíparos y ovíparos?

  • El desarrollo embrionario
  • El tipo de fecundación
  • El lugar donde se desarrolla el embrión (correct)
  • El número de gametos liberados

¿Qué tipo de desarrollo experimentan algunos animales que surgen del huevo?

<p>Desarrollo directo (A)</p> Signup and view all the answers

¿Qué es la metamorfosis?

<p>El conjunto de cambios hasta la forma adulta (D)</p> Signup and view all the answers

¿Cuál es la función de las hormonas sexuales en la reproducción?

<p>Regulan la respuesta sexual y el ciclo reproductivo (C)</p> Signup and view all the answers

¿Cuál es el propósito principal de la reproducción sexual en las plantas?

<p>Conservar las características generales de la planta, pero con variación genética (C)</p> Signup and view all the answers

¿Qué tipo de plantas se caracteriza por producir conos y no flores?

<p>Gimnospermas (C)</p> Signup and view all the answers

¿Cuál es la función principal de los conos masculinos en las gimnospermas?

<p>Contener los gametos masculinos (C)</p> Signup and view all the answers

¿Cómo se produce la fecundación en las gimnospermas?

<p>Por la acción del viento que arrastra los gametos masculinos hacia el cono femenino (A)</p> Signup and view all the answers

¿Qué tipo de plantas se caracteriza por producir flores?

<p>Angiospermas (C)</p> Signup and view all the answers

¿Cuál es el resultado final de la reproducción en las gimnospermas?

<p>Una semilla envuelta en una lámina fina (C)</p> Signup and view all the answers

¿Cuál es la función principal del prepucio en el pene?

<p>Proteger la cabeza del pene de agentes abrasivos externos (A)</p> Signup and view all the answers

¿Dónde se almacenan y maduran los espermatozoides?

<p>En el epidídimo (A)</p> Signup and view all the answers

¿Cuál es la función principal de la vesícula seminal?

<p>Producir semen con sustancias nutritivas (A)</p> Signup and view all the answers

¿Qué estructuras dentro del pene producen la erección?

<p>Los cuerpos cavernosos (B)</p> Signup and view all the answers

¿Cuál es la función principal de la próstata?

<p>Producir un líquido alcalino para reducir la acidez de la vagina (A)</p> Signup and view all the answers

¿Qué conducto lleva el semen que contiene espermatozoides al exterior?

<p>La uretra (C)</p> Signup and view all the answers

¿Cuál es el órgano que libera la hormona liberadora de gonadotropina (GnRH) en los seres humanos?

<p>Hipotálamo (A)</p> Signup and view all the answers

¿Cuál es la función principal de las gonadotropinas en el cuerpo humano?

<p>Estimular la producción de hormonas sexuales en las gónadas (D)</p> Signup and view all the answers

¿Qué hormona sexual característica se produce en los testículos?

<p>Testosterona (D)</p> Signup and view all the answers

¿Cuál es el nombre de la hormona que se libera en la hipófisis?

<p>FSH y LH (D)</p> Signup and view all the answers

¿Cuál es la función de la hormona liberadora de gonadotropina (GnRH)?

<p>Afectar la hipófisis y producir gonadotropinas (A)</p> Signup and view all the answers

¿Cuáles son los genitales externos del hombre?

<p>Pene, prepucio y escroto (D)</p> Signup and view all the answers

¿Cuál es el objetivo principal de los genitales externos?

<p>Participar en la copulación y proteger los genitales internos (A)</p> Signup and view all the answers

¿Cuál es el espacio inferior del útero?

<p>Cérvix del útero (D)</p> Signup and view all the answers

¿Dónde ocurre la fecundación?

<p>En las trompas de Falopio (D)</p> Signup and view all the answers

¿Cuál es la función de los ovarios?

<p>Producir hormonas sexuales femeninas (B)</p> Signup and view all the answers

¿Cuál es la etapa del ciclo menstrual en la que los niveles de progesterona y estrógeno son bajos?

<p>Fase folicular (D)</p> Signup and view all the answers

¿Qué sucede en la fase lútea del ciclo menstrual?

<p>Descienden las concentraciones de las hormonas luteinizante y foliculoestimulante (D)</p> Signup and view all the answers

Flashcards

What is the function of the copulatory organ in males?

Depositing male gametes (sperm) into the female's body during mating.

What kind of fertilization occurs in aquatic animals?

Fertilization occurs outside the bodies of the organisms, usually in water.

What is the difference between viviparous and oviparous organisms?

The main difference between viviparous and oviparous animals is the location where the embryo develops.

What type of development do some animals that hatch from eggs undergo?

The embryo develops directly into a miniature version of the adult without undergoing significant transformations.

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What is metamorphosis?

A series of transformations an organism undergoes to reach its adult form.

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What is the function of sexual hormones in reproduction?

Hormones like estrogen and testosterone regulate sexual responses and the reproductive cycle in both males and females.

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What is the main purpose of sexual reproduction in plants?

The main purpose is to ensure the survival of the species by producing offspring with genetic variation.

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What type of plants are known for producing cones instead of flowers?

They are characterized by producing cones instead of flowers for reproduction.

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What is the main function of male cones in gymnosperms?

They contain the male gametes (pollen) necessary for fertilization.

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How does fertilization occur in gymnosperms?

Fertilization occurs through wind pollination, where pollen is carried by the wind to the female cone.

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What type of plants are characterized by producing flowers?

They are characterized by producing flowers, the reproductive structures that attract pollinators.

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What is the final outcome of reproduction in gymnosperms?

It results in the formation of a seed enclosed within a thin layer, often called a seed coat.

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What is the main function of the prepuce in the penis?

It protects the glans penis from abrasions and other external factors.

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Where are sperm cells stored and matured?

Sperm cells mature and are stored in the epididymis before being released.

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What is the main function of the seminal vesicle?

To produce seminal fluid, which provides nutrients and a medium for sperm transport.

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What structures inside the penis enable erection?

The corpora cavernosa are spongy tissues that engorge with blood, causing the penis to become erect.

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What is the main function of the prostate?

The prostate produces a slightly alkaline fluid that counteracts the acidity of the vagina, creating a more favorable environment for sperm.

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What duct carries semen containing sperm to the outside?

The urethra is the duct that carries semen, containing sperm, from the reproductive system to the outside.

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What organ releases GnRH in humans?

The hypothalamus releases GnRH, a hormone that stimulates the pituitary gland.

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What is the main function of gonadotropins in the human body?

Gonadotropins like FSH and LH stimulate the production of sex hormones in the gonads (testes and ovaries).

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What is the characteristic sex hormone produced in the testes?

Testosterone is the primary sex hormone produced in the testes, responsible for male sexual development.

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What is the name of the hormone that is released in the pituitary gland?

The pituitary gland, also known as the master gland, releases FSH and LH, which play a vital role in reproduction.

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What is the function of GnRH?

GnRH affects the pituitary gland, stimulating it to produce gonadotropins (FSH and LH).

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What are the external genitals of a male?

They include the penis, prepuce (foreskin), and scrotum, which play a role in copulation and protection.

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What is the main objective of the external genitals?

They are primarily involved in copulation (sexual intercourse) and protect the internal reproductive organs.

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What is the space below the uterus?

It's the lower opening of the uterus, connecting the uterine cavity to the vagina.

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Where does fertilization occur?

Fertilization typically occurs in the fallopian tubes, where the sperm meets the egg.

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What is the function of the ovaries?

Ovaries produce female sex hormones like estrogen and progesterone, and also release eggs for potential fertilization.

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What is the stage of the menstrual cycle when progesterone and estrogen levels are low?

It is the stage in the menstrual cycle when estrogen and progesterone levels are low, preceding ovulation.

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What happens during the luteal phase of the menstrual cycle?

The luteal phase is characterized by a decrease in LH and FSH and a rise in progesterone, preparing the uterus for potential pregnancy.

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