Where are calcium ions stored before a signaling pathway releases them into the cytosol?
a. nucleus
b. ribosome
c. lysosome
d. plasma membrane
e. endoplasmic reticulum
e
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The neuromuscular junction is incorrectly described in which of the following statements?
A) Neurotransmitters are stored in vesicles in the axon terminal. B) The sarcolemma is the plasma membrane of a muscle cell. C) Acetylcholine binds receptors in the synaptic cleft. D) T tubules carry action potentials into the muscle cell. E) Acetylcholine binding allows sodium ions to enter the muscle cell.
DNA sequences that contribute to polygenic traits are called
A) qualitative trait loci. B) quantitative trait loci. C) multifactorial trait loci. D) single nucleotide polymorphisms.
Specific heat capacity
What will be an ideal response?
Which of the following species do paleoanthropologists believe may be the most direct ancestor to Homo sapiens?
A) Homo neanderthalensis B) Homo ergaster C) Homo habilis D) Homo heidelbergensis E) Homo erectus