Biological Clocks and Circadian Rhythms

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What is the name of the internal rhythm that regulates our sleep-wake cycle?

Environmental cycle

Circadian rhythm (correct)

Biological clock

Daily rhythm

Where is the biological clock located in mammals?

Cerebrum

Medulla oblongata

Hypothalamus (correct)

Cerebellum

What do biological clocks require to be calibrated to an exact 24-hour cycle?

Environmental cues (correct)

Hormonal stimulation

Nutrient intake

Genetic programming

What is the primary consideration for choosing the type of signal to send during communication?

All of the above Signup and view all the answers

Why is a visual signal not effective at night?

Because the receiver won't be able to see it Signup and view all the answers

What is the primary function of a biological clock?

To maintain a constant internal rhythm Signup and view all the answers

What is the purpose of using multiple signals in animal communication?

To enhance and reinforce the message being delivered Signup and view all the answers

Which process is responsible for regulating body temperature in warm-blooded animals?

Thermoregulation Signup and view all the answers

What is the temperature of a bird's internal body system?

104 degrees Fahrenheit Signup and view all the answers

During which process do the male and female gametes combine to form a zygote?

Fertilization Signup and view all the answers

What is the purpose of the tunica vaginalis in the testicles?

To protect the testicles from friction Signup and view all the answers

Why are the testicles located outside of the abdominal cavity?

To achieve the right temperature for sperm survival Signup and view all the answers

What is the function of the cremasteric reflex in the testicles?

To regulate the temperature by contracting the testicles Signup and view all the answers

What triggers the contraction of blood vessels in the penis to allow an erection to happen?

Constriction of the arteries in the penis Signup and view all the answers

What is the main function of the ovaries in the female reproductive system?

To produce gametes known as eggs Signup and view all the answers

What is the purpose of the infundibulum in the fallopian tubes?

To receive the ovulated egg Signup and view all the answers

What happens to the uterine lining if fertilization and implantation do not occur?

It is shed Signup and view all the answers

What is the function of the cervix in the female reproductive system?

To regulate sperm entry into the uterus Signup and view all the answers

Where does fertilization occur in the female reproductive system?

In the fallopian tubes Signup and view all the answers

What is the function of the vagina in the female reproductive system?

To allow sperm deposition during sexual intercourse Signup and view all the answers