FREE Bachelor of Biomedical Engineering Questions and Answers

Question 1

Bioelectric potential's natural source is .

Accepted Answer

ionic

Answer

Bioelectric potentials, such as those responsible for nerve impulses and muscle contractions, are naturally generated in biological systems by the movement and differential distribution of ions across cell membranes. The selective permeability of these membranes to various ions (like sodium, potassium, and chloride) creates an electrochemical gradient, leading to an electrical potential difference that drives these biological signals.

Question 2

Muscle palsies indicate

Accepted Answer

paralyzed muscles

Answer

Muscle palsies refer to a condition characterized by paralysis or significant weakness of muscles, often resulting in a loss of voluntary movement or impaired motor function. This term specifically indicates that the affected muscles are unable to function normally, distinguishing them from active, voluntary, or involuntary muscles that retain their typical capabilities. It signifies a state of impaired or lost muscle control.

Question 3

The primary ion that is not connected to the process of creating cell potentials is .

Accepted Answer

hydrogen

Answer

The primary ions responsible for establishing and changing cell potentials, such as resting and action potentials, are sodium (Na+), potassium (K+), and chloride (Cl-) ions. Their differential distribution across the cell membrane and selective movement through ion channels create the electrochemical gradients. While hydrogen ions (H+) are crucial for pH balance, they do not directly participate in the rapid electrical signaling mechanisms of nerve and muscle cells in the same way as Na+, K+, and Cl-.

Question 4

What is the name for the generally constant membrane potential of dormant cells?

Accepted Answer

resting membrane potential

Answer

The generally constant membrane potential of dormant or unstimulated cells is known as the resting membrane potential. This potential is established and maintained by the differential distribution of ions, primarily sodium, potassium, and chloride, across the cell membrane, along with the selective permeability of the membrane to these ions and the action of ion pumps. It represents the baseline electrical state of an excitable cell.

Question 5

The change in electrical potential caused by a pulse traveling along a muscle cell or nerve cell's membrane is known as .

Accepted Answer

action potential

Answer

An action potential is a rapid, transient, and propagating change in the electrical potential across the membrane of an excitable cell, such as a nerve or muscle cell. This electrical pulse is generated when the membrane potential reaches a threshold, leading to a rapid depolarization followed by repolarization, and serves as the fundamental mechanism for transmitting information over long distances in the nervous system and initiating muscle contraction.

BE/B Eng Bachelor of Engineering Practice Test

BE/B Eng Bachelor of Engineering Practice Test

FREE Bachelor of Biomedical Engineering Questions and Answers