Exam (elaborations)
Practice exam key
- Course
- BIO 202
- Institution
- Northern Arizona University
Exam of 7 pages for the course BIO 202 at Northern Arizona University (Practice exam key)
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Practice Unit 1 Exam1. The endocrine system acts more ____ than the nervous system.
a. slowly
b. quickly
2. A _________ hormone is made of lipids and __________ cross the plasma
membrane. It needs a _____________ receptor to have an effect.
a. lipid soluble; can; membrane
b. lipid soluble; can; intracellular
c. non-lipid soluble; cannot; intracellular
d. non-lipid soluble; cannot; membrane
3. A ___________hormone is made of amino acids and ____________ cross the plasma
membrane so it needs a ______________ receptor to have an effect.
a. lipid soluble; can; intracellular
b. lipid soluble; cannot; intracellular
c. lipid soluble; can; membrane
d. non-lipid soluble; cannot; membrane
4. When the nervous system directly activates an endocrine gland, it is called __________.
a. Neural stimuli
b. Hormonal stimuli
c. Humoral stimuli
d. Autonomic stimuli
5. When one hormone prepares a target tissue for the arrival of a second hormone (often
by causing the target tissue to express receptors for the second hormone), we say the
hormones are ___________________ .
a. synergistic
b. permissive
c. additive
d. antagonists
6. The sympathetic nervous system (SNS) neurons cause the adrenal medulla to
release ___________ and ___________ into the blood.
a. Paraganglion; postganglion
b. epinephrine; norepinephrine
c. thyroid stimulating hormone; amino acids
d. lipids; epinephrine
7. Steroid hormones travel in the blood bound to carrier proteins, freely travel across the
plasma membrane, and then bind to a(n) ____________ receptor.
a. Red blood cell
b. Extracellular
c. Intracellular
, Practice Unit 1 Exam
d. Target gene
8. The receptor and steroid hormone enter the nucleus and bind to the ____________ and
activate ______________.
a. Target gene; transcription
b. Target gene; translation
c. Hormone response element; transcription
d. Hormone response element; translation
9. Let's say that a certain anatomy & physiology professor eats an excessive amount of
sugar for years and years (she really loves sugar even though she knows she
shouldn't.) As a consequence, her pancreas is constantly cranking out high levels of
insulin. If this were to continue, what would happen to the insulin receptors on the
target cells?
a. The insulin receptors would be downregulated due to the chronic high exposure
to insulin, resulting in a decreased response to insulin.
b. The insulin receptors would be upregulated to create a lesser response to
insulin.
c. The insulin receptors would be upregulated to create a greater response to
insulin.
d. The insulin receptors would be mutated to bind to glucose instead.
10. The hypothalamus is a key regulator of:
a. The brain
b. Disease
c. Cognition
d. Homeostasis
11. ________ is the time required for the plasma levels of a hormone to be reduced
by 50%. While greatly variable, this time can range from minutes to hours
depending on the hormone.
a. Half life
b. Quarter life
c. Double life
d. Quadruple life
12. __________, also known as _________ , occurs when a target cell increases the
number of receptors for a given hormone, resulting in a greater response to that
hormone.
a. Downregulation; upregulation
b. Priming; downregulation
c. Priming; upregulation
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