Why is saltatory conduction faster than continuous conduction? What will be an ideal response?


Concepts to Consider: In continuous conduction, action potentials smoothly progress down an axon. Depolarization in one area causes adjacent voltage-gated ion channels to open,
sodium ions to flow in, etc. In saltatory conduction, axons are wrapped in myelin with only
nodes of Ranvier being exposed to extracellular fluid. Voltage-gated Na+ channels are mainly
clustered at nodes, so depolarization jumps from node to node down the axon.

Biology & Microbiology

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Match the following items with the correct phrases.

_______1. In addition to standard precautions, ____________________ must be used when managing a patient with streptococcal pneumonia. _______2. The goal of ____________________ is to render and keep objects and areas sterile. _______3. In addition to standard precautions, ____________________ must be used when managing a tuberculosis patient. _______4. The goal of ____________________ is to reduce the number and transmission of pathogens. _______5. In addition to standard precautions, ____________________ must be used when managing a Clostridium difficile–associated disease. a. airborne precautions b. contact precautions c. droplet precautions d. medical aseptic technique e. surgical aseptic technique

Biology & Microbiology

Which of the following statements about effector cells is FALSE?

a. They are fully differentiated lymphocytes. b. They can develop from either B cells or T cells. c. They secrete immunoglobulins or interleukins depending on their origin. d. Cytotoxic T cells are effector cells e. Helper T-cells are not effector cells.

Biology & Microbiology

Action potentials are propagated along a(n) ____

a. sodium channel b. axon in two directions c. gated channel d. axon in one direction e. dendrite

Biology & Microbiology

Which tends to be more intense: intraspecific or interspecific competition? Why?

What will be an ideal response?

Biology & Microbiology