1|Page
BIOS 252: Written Exam Review Questions and
Answers with Verified Solutions
Discriminate between paracrine, autocrine, endocrine, and
exocrine? - ANSWER - Paracrine glands: relating to a hormone
or to a secretion released by (endocrine) cells into the adjacent
cells or surrounding tissue rather than into the bloodstream.
- Autocrine hormones act on the same cells that produce them
- Endocrine glands secrete hormones into the bloodstream
(pituitary, pineal, thyroid)
- Exocrine glands secrete substances through a duct or opening
to a body surface (Sweat, salivary, mammary)
Choose 1 endocrine gland and describe the hormones it
secretes; including the functions of each hormone and how the
endocrine gland is regulated. - ANSWER Thyroid gland:
- Secretes: Triiodothyronine (T3), Thyroxine (T4), and calcitonin
- Functions: regulate the speed with which the cells/metabolism
work (heart rate), calcitonin regulates levels of calcium and
phosphate in the blood
- The thyroid gland is regulated by thyrotropin releasing
hormone (TRH) and thyroid stimulating hormone (TSH)
, 2|Page
Where are the receptor cells for hearing? - ANSWER Cochlea
Area of the eye where vessel's enter and leave? - ANSWER
Optic Nerve
Frontal Lobe - ANSWER The lobe at the front of the brain
associated with movement, speech, and impulsive behavior.
Temporal Lobe - ANSWER A region of the cerebral cortex
responsible for hearing and language.
Parietal Lobe - ANSWER A region of the cerebral cortex whose
functions include processing information about touch.
Occipital Lobe - ANSWER A region of the cerebral cortex that
processes visual information
How do lens focus light onto the retina? - ANSWER It changes
shape (flat or semi-circular)
BIOS 252: Written Exam Review Questions and
Answers with Verified Solutions
Discriminate between paracrine, autocrine, endocrine, and
exocrine? - ANSWER - Paracrine glands: relating to a hormone
or to a secretion released by (endocrine) cells into the adjacent
cells or surrounding tissue rather than into the bloodstream.
- Autocrine hormones act on the same cells that produce them
- Endocrine glands secrete hormones into the bloodstream
(pituitary, pineal, thyroid)
- Exocrine glands secrete substances through a duct or opening
to a body surface (Sweat, salivary, mammary)
Choose 1 endocrine gland and describe the hormones it
secretes; including the functions of each hormone and how the
endocrine gland is regulated. - ANSWER Thyroid gland:
- Secretes: Triiodothyronine (T3), Thyroxine (T4), and calcitonin
- Functions: regulate the speed with which the cells/metabolism
work (heart rate), calcitonin regulates levels of calcium and
phosphate in the blood
- The thyroid gland is regulated by thyrotropin releasing
hormone (TRH) and thyroid stimulating hormone (TSH)
, 2|Page
Where are the receptor cells for hearing? - ANSWER Cochlea
Area of the eye where vessel's enter and leave? - ANSWER
Optic Nerve
Frontal Lobe - ANSWER The lobe at the front of the brain
associated with movement, speech, and impulsive behavior.
Temporal Lobe - ANSWER A region of the cerebral cortex
responsible for hearing and language.
Parietal Lobe - ANSWER A region of the cerebral cortex whose
functions include processing information about touch.
Occipital Lobe - ANSWER A region of the cerebral cortex that
processes visual information
How do lens focus light onto the retina? - ANSWER It changes
shape (flat or semi-circular)
