Perforating canals form transverse channels in bone tissue.
Indicate whether the statement is true or false
(
Question 2) Cell division consists of mitosis (karyokinesis) and cell differentiation.
Indicate whether the statement is true or false
(
Question 3) Arrange the following steps of muscle fiber contraction in the correct sequence.
1. The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.
2. Thin filaments are pulled over the thick filaments.
3.
Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.
4. The impulse arrives at the synapse and travels through the transverse tubules.
5. The muscle fiber shortens and contracts.
6. Myosin heads bind to exposed active sites on actin, forming cross-bridges.
7-30-2013
A) 4, 1, 3, 2, 6, 5 B) 4, 1, 3, 5, 6, 2
C) 4, 1, 3, 6, 2, 5 D) 4, 3, 6, 2, 5, 1
(
Question 4) The outermost layer of the epidermis is the stratum basale and the innermost layer is the
stratum corneum.
Indicate whether the statement is true or false
(
Question 5) DNA and RNA differ in strandedness, type of sugar, and types of nitrogenous bases.
Indicate whether the statement is true or false
(
Question 6) The neurotransmitter that controls skeletal muscle contraction is
A) beta endorphin. B) acetylcholine.
C) nitric oxide. D) GABA.
(
Question 7) Endocrine means
A) internal secretion. B) hormone synthesis.
C) acts upon target cells. D) fast-acting compound.
(
Question 8) Henry has hereditary sensory and autonomic neuropathy. He lacks
A) nociceptors. B) baroreceptors.
C) chemoreceptors. D) mechanoreceptors.
(
Question 9) The pattern of gray matter in the spinal cord is divided into
A) horns. B) roots of spinal nerves.
C) meninges. D) funiculi.
(
Question 10) A bone shaft is the diaphysis; the expanded parts at the ends are the epiphyses.
Indicate whether the statement is true or false
Quick Reply
