Chapter 1 Lesson 1.4: Varieties of Cells in the Body
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Questions and Answers

The nerve cell is commonly known as a _______

neuron

The nerve cell facilitates in the transmission of messages for the _______ to function

brain

The nerve cell has three main parts: dendrites, an axon, and a cell body or _______

soma

Cells vary enormously in terms of appearance to perform a specific _______

<p>function</p> Signup and view all the answers

There are about 200 different cell types inside your body, each possessing characteristics that suit its _______

<p>functions</p> Signup and view all the answers

Dendrites are fibrous roots that branch out from the cell body and function to conduct electrical impulses toward the cell body of the nerve _______

<p>cell</p> Signup and view all the answers

Axon is a tube-like structure that carries electrical impulses away from the cell body of a ________

<p>nerve cell</p> Signup and view all the answers

The ________ is the smallest cell in the human body

<p>sperm cell</p> Signup and view all the answers

Egg cell is the female gamete and the ________ is the male gamete

<p>sperm cell</p> Signup and view all the answers

Red blood cells (RBC) are also known as ________

<p>erythrocytes</p> Signup and view all the answers

White blood cells (WBC) are cells of the immune system responsible for protecting and fighting against invading pathogens, also known as ________

<p>leukocytes</p> Signup and view all the answers

The average lifespan of a Red Blood Cell (RBC) is about ________ days

<p>120</p> Signup and view all the answers

Basophils produce an allergic response like coughing, sneezing or a runny nose. Eosinophils identify and destroy parasites, cancer cells and assist basophils with your allergic response. Monocytes defend against infection by cleaning up damaged cells. Lymphocytes consist of T cells, natural killer cells and B cells to protect against viral infections and produce proteins to help you fight infection (antibodies). _________ also known as thrombocytes, are specialized blood cells produced from bone marrow.

<p>Platelets</p> Signup and view all the answers

Muscle cells, commonly known as myocytes, are the cells that make up muscle tissue. The 3 types of muscle tissue are cardiac, smooth, and _________.

<p>skeletal</p> Signup and view all the answers

A gland cell produces and releases substances such as hormones that perform a specific function in the body. There are two types of gland - endocrine and _________.

<p>exocrine</p> Signup and view all the answers

Endocrine glands secrete their substances directly into your bloodstream. They’re called ductless glands. Endocrine glands are part of your endocrine system, and they secrete _________.

<p>hormones</p> Signup and view all the answers

Examples of endocrine glands include your pituitary gland, thyroid gland and _________.

<p>adrenal glands</p> Signup and view all the answers

Exocrine glands secrete substances through ducts onto your bodily surfaces. Exocrine glands can be found in many different organs and have many different functions. Gland cells, _________ glands secrete substances through ducts onto your bodily surfaces.

<p>exocrine</p> Signup and view all the answers

Study Notes

Nerve Cells

  • Nerve cells are commonly referred to as neurons.
  • They facilitate the transmission of messages essential for bodily functions.
  • Neurons comprise three main parts: dendrites, axon, and cell body (soma).

Cell Variability

  • Cells greatly vary in appearance and function to meet specific roles.
  • The human body contains approximately 200 different cell types, each adapted to their unique function.

Function of Dendrites and Axons

  • Dendrites are fibrous extensions from the cell body that conduct electrical impulses towards it.
  • The axon is a tube-like structure that transmits electrical impulses away from the cell body.

Types of Cells and Gametes

  • The egg cell is the female gamete, while the sperm cell is the male gamete.
  • Red blood cells (RBC) are also known as erythrocytes.

Immune System Cells

  • White blood cells (WBC), or leukocytes, play a crucial role in the immune response against pathogens.
  • The average lifespan of a red blood cell is roughly 120 days.

Types of White Blood Cells

  • Basophils induce allergic responses like sneezing and coughing.
  • Eosinophils target and eliminate parasites and assist in allergic reactions.
  • Monocytes clean up damaged cells and defend against infections.
  • Lymphocytes include T cells, natural killer cells, and B cells, which protect against viral infections and produce antibodies.

Specialized Blood Cells

  • Platelets, also known as thrombocytes, are specialized blood cells produced from bone marrow.

Muscle Tissue

  • Muscle cells, or myocytes, form muscle tissue.
  • There are three types of muscle tissue: cardiac, smooth, and skeletal.

Gland Cells

  • Gland cells produce and release substances such as hormones.
  • Two types of glands exist: endocrine and exocrine.
  • Endocrine glands are ductless; they directly secrete hormones into the bloodstream and include the pituitary and thyroid glands.
  • Exocrine glands release substances through ducts onto body surfaces, serving various functions.

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Learn about the different varieties of cells in the human body, understanding how they originate from preexisting cells and share common functions such as energy generation and reproduction. Discover how cells can vary greatly in appearance based on their specialized functions.

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