Essay Questions Bio
Essay Questions Exam 3
Chapter 40
a. Describe a key function of each of the four types of tissues found in animals.
1. Epithelial tissue (squamous, columnar, cuboidal) makes up the lining and coverings. This type of tissue is found in the skin (epidermis and dermis), surrounding the organs of the body, and outer layer of capillaries (diffusion).
2. Connective tissue (loose, adipose, blood, fibrous, bone) holds organs in place and attaches epithelial tissue to other underlying tissues. A collagenous fiber is a dense connective tissue which can be regular or irregular. Regular dense collagen fibers are found in the tendons, which bind muscle to bone, and ligaments, which join bones together. Blood connective tissue is used in transporting substances from one part of the body to another. Adipose tissue stores large droplets of fat that swells when stored and shrinks when used for energy. Bone is rigid connective tissue which provides support for muscle attachment and protects internal organs.
3. Smooth muscle tissue is found surrounding hollow tubes and wave like contractions move food particles through the alimentary canal. Cardiac muscle tissues have intercalated discs where the plasma membrane interlocks. Cardiac muscle tissue holds cells together and allows ions and impulses to travel cell to cell. Skeletal muscle tissue is used for movement and posture, breathing by the diaphragm, and the excretion of waste by sphincters.
4. Nerve tissue sense stimuli and transmit signals from one part of the body to another. Neurons are the basic unit of nervous tissue. Axons carry signals away from the cell body and dendrites carry signals toward the cell body. Nervous tissue provides support for the brain, controls metabolic activities and powers neurons by synthesizing energy and is in charge of the neuron’s growth and repair.
b. Explain the difference between negative and positive feedback control mechanisms.
1. Feedback mechanisms are seen in such things as
Chapter 40
a. Describe a key function of each of the four types of tissues found in animals.
1. Epithelial tissue (squamous, columnar, cuboidal) makes up the lining and coverings. This type of tissue is found in the skin (epidermis and dermis), surrounding the organs of the body, and outer layer of capillaries (diffusion).
2. Connective tissue (loose, adipose, blood, fibrous, bone) holds organs in place and attaches epithelial tissue to other underlying tissues. A collagenous fiber is a dense connective tissue which can be regular or irregular. Regular dense collagen fibers are found in the tendons, which bind muscle to bone, and ligaments, which join bones together. Blood connective tissue is used in transporting substances from one part of the body to another. Adipose tissue stores large droplets of fat that swells when stored and shrinks when used for energy. Bone is rigid connective tissue which provides support for muscle attachment and protects internal organs.
3. Smooth muscle tissue is found surrounding hollow tubes and wave like contractions move food particles through the alimentary canal. Cardiac muscle tissues have intercalated discs where the plasma membrane interlocks. Cardiac muscle tissue holds cells together and allows ions and impulses to travel cell to cell. Skeletal muscle tissue is used for movement and posture, breathing by the diaphragm, and the excretion of waste by sphincters.
4. Nerve tissue sense stimuli and transmit signals from one part of the body to another. Neurons are the basic unit of nervous tissue. Axons carry signals away from the cell body and dendrites carry signals toward the cell body. Nervous tissue provides support for the brain, controls metabolic activities and powers neurons by synthesizing energy and is in charge of the neuron’s growth and repair.
b. Explain the difference between negative and positive feedback control mechanisms.
1. Feedback mechanisms are seen in such things as