The lens of the eye flattens when
A. extrinsic eye muscles contract.
B. intrinsic muscles of the iris contract.
C. extrinsic eye muscles relax.
D. ciliary muscles contract.
E. ciliary muscles relax.
Answer: E
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The myocardium (cardiac muscle tissue) undergoes a significant amount of physical stress due to its contractions. You would expect to see relatively large numbers of which of the following embedded within their plasma membrane?
A) tight junctions B) desmosomes C) glycolipids D) transport proteins
The sustentacular cells
A. provide nourishment for development of sperm cells. B. mature to form sperm cells. C. produce testosterone. D. cover and protect most of the testes. E. produce seminal fluid.
Phospholipid tails are hydrophilic and are attracted to water
Indicate whether the statement is true or false
External neural and hormonal regulation are ways to modulate
a. smooth muscle and glands directly. b. the nerve plexuses. c. smooth muscle only. d. glands only. e. all of these.