Membrane Structure and Function

¡Supera tus tareas y exámenes ahora con Quizwiz!

either direction

Passive transport permits the solute to move in ________.

turgor pressure

A cell placed in a hypotonic solution would exude a high _________.

Endocytosis

A nursing infant is able to obtain disease-fighting antibodies, which are large protein molecules, from its mother's milk. These molecules probably enter the cells lining the baby's digestive tract via which process?

membrane potential; electrogenic pumps

All cells have voltages across their membranes. This voltage is called a(n) __________ and is often maintained by __________.

B; the diffusion gradient in cell B is steeper

Cells A and B are the same size, shape, and temperature, but cell A is metabolically less active than cell B; cell B is actively converting oxygen to water in cellular respiration. Oxygen will diffuse more rapidly into cell __________ because __________.

channel

In facilitated diffusion, __________ proteins provide openings in the plasma membrane for substances to flow through without changing structure

the concentration gradient of the molecule

Net movement of the population of solute molecules occurs down ________.

into the cell

The sodium-potassium pump transports sodium ions out of the cell and transports potassium ions __________.

Cell-to-cell recognition

What function do carbohydrates fulfill in the plasma membrane?

These proteins exhibit both hydrophilic and hydrophobic properties.

Which of the following is correct regarding integral proteins?

Facilitated diffusion of solutes may occur through channel or transport proteins in the membrane.

Which of these statements describes some aspect of facilitated diffusion?

Because it moves solutes against their concentration gradient

Why is energy required for active transport?

Carrier

__________ proteins allow passage of substances through the plasma membrane after undergoing a subtle change in shape.

the surface of the plasma membrane

Where are peripheral proteins found?

It is a passive process.

Which of the following statements about diffusion is true?


Conjuntos de estudio relacionados

Managerial Accounting Final Work Through

View Set

Financial Accounting- Chapter 5: Receivables and Sales

View Set

Chapter 16: Toward a New Worldview

View Set

Chapter 2: Financial Aspects of Career Planning

View Set

AST Practice Bonus Exam #2 (part 4)

View Set

ATI Adult Medsurg Ch. 10- Multiple Sclerosis

View Set

Chap. 29 Autonomic Nervous System

View Set

MGT 371 Ch7: Negotiating and resolving conflict

View Set