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BIO 253 Exam 1 Questions And Answers With Verified Solutions

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BIO 253 Exam 1 Questions And Answers With Verified Solutions In primary and secondary active transport, at least one substance will move against its - Answer️️ -concentration gradient The location of the binding sites on the Na-K pump dictates the _ of solute movement - Answer️️ -direc...

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  • September 18, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIO 253
  • BIO 253
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BIO 253 Exam 1 Questions And Answers
With Verified Solutions

In primary and secondary active transport, at least one substance will move against its -

Answer✔️✔️-concentration gradient


The location of the binding sites on the Na-K pump dictates the _ of solute movement -

Answer✔️✔️-direction

By which two modes of transport does glucose cross the cell membrane? - Answer✔️✔️-

SAT and facilitated diffusion

Which transport processes can be saturated? - Answer✔️✔️-anything with a protein

Where is the Na/K ATPase found in the intestines? - Answer✔️✔️-Basolateral membrane

If a cell were to become depleted of its ATP, which type of membrane transport would

be most directly and immediately affected? - Answer✔️✔️-PAT

As solute concentration of a solution increases, water concentration ___ and osmotic

pressure ___ - Answer✔️✔️-decreases, increases

Extracellular fluid becomes hypotonic and brain cells swell - Answer✔️✔️-water toxicity

Multi-unit smooth muscle _ gap junctions and has _ innervation by the autonomic

nervous system - Answer✔️✔️-lacks, dense

In which muscle types does myosin have ATPase activity? - Answer✔️✔️-smooth,

cardiac, skeletal

, TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024

Which muscle fiber type experiences slow-wave potentials - Answer✔️✔️-smooth

Single-unit smooth muscle _ gap junctions and has _ innervation by the autonomic

nervous system - Answer✔️✔️-has, light

Contraction in smooth muscle is terminated when - Answer✔️✔️-a phosphatase

dephosphorylates myosin

A molecule common to skeletal AND smooth muscle crossbridge cycling - Answer✔️✔️-

actin

An overlap of cardiac action potential prevents - Answer✔️✔️-summation

Why do we want to prevent summation? - Answer✔️✔️-so the heart can fill with blood

Three ways in which cardiac muscle is similar to smooth muscle - Answer✔️✔️-gap

junctions, pacemaker cells, innervated by autonomic neurons

Contraction in smooth muscle is initiated when - Answer✔️✔️-calcium binds to calmodulin

In smooth muscle, actin and myosin generate force through the - Answer✔️✔️-

crossbridge cycle

In smooth muscle, thick and thin filaments are arranged _ - Answer✔️✔️-obliquely

Smooth muscles have _ sarcoplasmic reticulum than skeletal muscles - Answer✔️✔️-less

The second messenger DAG is - Answer✔️✔️-membrane bound

Ligands that bind to target cell receptors but don't initiate response - Answer✔️✔️-

antagonists

Fastest acting membrane-bound receptors - Answer✔️✔️-channel-linked

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