Practice Questions

TLS Online TPP Program

#Question id: 11145

Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.

#Unit 7. System Physiology – Animal

are always open, but the concentration gradients of ions frequently change
are always closed, but ions move closer to the channels during excitation
are open or closed depending on their type, and are specific as to which ion can traverse them
open in response to stimuli, and then close simultaneously, in unison

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TLS Online TPP Program

#Question id: 14980

#Unit 2. Cellular Organization

The membranes of eukaryotes and mycoplasma

TLS Online TPP Program

#Question id: 14981

#Unit 2. Cellular Organization

The endoplasmic reticulum has many important functions. It transports proteins, lipids, and probably other materials through the cell. The ER is also a major site of

TLS Online TPP Program

#Question id: 14982

#Unit 2. Cellular Organization

A very important function of the Golgi apparatus and endoplasmic reticulum is the synthesis of another organelle, the lysosome. This organelle is found in a variety of organisms such as—

In which of the above organisms lysosome is not found.

TLS Online TPP Program

#Question id: 14983

#Unit 2. Cellular Organization

A network of intermediate filaments, called the nuclear lamina, lies against the inner surface of the envelope and supports it. Which structure usually is associated with the inner membrane

TLS Online TPP Program

#Question id: 14984

#Unit 2. Cellular Organization

Just beneath the plasma membrane many protozoa and some algae have a different external, rigid layer of components. The structure is called as

TLS Online TPP Program

#Question id: 14985

#Unit 4. Cell Communication and Cell Signaling

Neutrophills containing granules which have protease, protease inhibitors, for example

a) α-1 antitrypsin – regulation of proteases

b) Defensin – Direct harm to pathogen

c) Elastase – Tissue remodelling

d) MBP – basophil degranulation