Exam 2: Cell Physiology

Match the terms, labelled a. through f., to their correct descriptions. (Options may be used more than once or not at all.) a.plasma membrane b.nucleus c.cytoplasm d.cytosol e.organelles f.cytoskeleton -selectively controls movement of molecules between the intracellular fluid and the extracellular fluid

Where do the citric acid cycle reactions occur?

The refractory period limits the frequency of action potentials.

Match the terms, labelled a. through f., to their correct descriptions. (Options may be used more than once or not at all.) a.plasma membrane b.nucleus c.cytoplasm d.cytosol e.organelles f.cytoskeleton -site of intermediary metabolism

Which of these organelles occurs in the lowest numbers within a typical human cell?

____________________ join the lateral edges of epithelial cells together near their luminal borders, thus preventing passage of materials between the cells.

What might happen if niacin is deficient in your diet?

Compare and contrast neuromodulation and presynaptic inhibition/facilitation.

The lysosomes are one site of protein synthesis.

A stimulus that is too weak to depolarize the membrane to threshold produces an action potential smaller than normal.

Cilia in the respiratory tract beat in the same direction to sweep inspired particles up and out of the airways.

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) a.microtubules b.microfilaments c.intermediate filaments d.micro trabecular lattice -consist of actin

Which of the following is correct about intermediate filaments?

Neuropeptides are stored in ____________________ vesicles.

Which of these statements is correct for neural stem cells?

The conduction velocity of a nerve impulse is slower in myelinated fibres than in unmyelinated fibres because myelin acts as an insulator that slows the flow of current.

Insulin is a long ____________________ chain.

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) a.flagella b.cilia c.microvilli -increase the surface area of the small intestine's epithelium

What is the correct sequence at a synapse? (1) neurotransmitter diffuses across cleft (2) calcium induces exocytosis of neurotransmitter (3) permeability of postsynaptic membrane altered (4) ion channels open (5) neurotransmitter binds to receptor on chemically gated channel

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) a.microtubules b.microfilaments c.intermediate filaments d.micro trabecular lattice -slide past each other to cause ciliary bending