/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q49.1-3ITD What general trends does the gra... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 49: Q49.1-3ITD (page 1093)

What general trends does the graph above reveal about the circadian cycle period of the transplant recipients? Do the trends differ for the wild-type and 饾洉 recipients? Based on these data, what can you conclude about the role of the SCN in determining the period of the circadian rhythm?

Short Answer

Expert verified

According to the graph, the donor and recipient's circadian cycle period was similar to each other. Whether it was饾洉mutant or wild-type, both were similar to the donor transplant.

No, the trends did not differ between the wild-type or饾洉recipients.

It can be deduced from this experiment that SCN is the major circadian pacemaker.

Step by step solution

01

τ (tau) mutation

The function of tau proteins is to stabilize the microtubules.Tau proteins are abundantly present in the nerve cells and are somewhat present in the oligodendrocytes.

The mutation in tau protein leads to progressive supranuclear palsy or Pick鈥檚 disease.

02

Circadian cycle in hamsters

A circadian pacemaker, located within the hypothalamus's suprachiasmatic nucleus (SCN), regulates behavior and hormonal function. Hamster鈥檚 circadian rhythms become compressed to the mother's rhythmicity during development.

03

Role of SCN in determining circadian rhythm

In animals, the suprachiasmatic nucleus (SCN) serves as the primary circadian pacemaker, synchronizing with the light/dark cycle in the environment. It comprises a variety of neurons, and interneural contact between them is crucial for the SCN circadian pacemaker.

04

General trends revealed from the graph

The graph shows thatthe wild-type and tau mutants' circadian rhythms were similar to that of the donor.There was no specific difference and the circadian rhythms reduced after the SCN was removed from the donor, and the recipient SCN increased after transplantation.

Thus, no specific difference was observed in the circadian rhythms of the recipient and donor hamsters. The role of SCN is specifically determined in the functioning of the circadian rhythms.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

For the wild-type hamsters that received 饾洉 SCN transplants, what would have been an appropriate experimental control?

Most tissues regulated by the autonomic nervous system receive both sympathetic and para sympathetic input from postganglionic neurons. Responses are typically local. In contrast, the adrenal medulla receives input only from the sympathetic division and only from preganglionic neurons, yet responses are observed throughout the body. Explain why (see Figure 45.19).

The reflex that pulls your hand away when you prick your finger on a sharp object relies on a neuronal circuit with two synapses in the spinal cord. (a) Using a circle to represent a cross section of the spinal cord, draw the circuit. Label the types of neurons, the direction of information flow in each, and the locations of synapses. (b) Draw a simple diagram of the brain indicating where pain would eventually be perceived.

Suppose you examine two groups of individuals with CNS damage. In one group, the damage has resulted in a coma (a prolonged state of unconsciousness). In the other group, it has caused paralysis (a loss of skeletal muscle function throughout the body). Relative to the position of the midbrain and pons, where is the likely site of damage in each group? Explain.

Which division of the autonomic nervous system would likely if a student learned that an exam she had forgotten about would activate start in 5 minutes? Explain your answer
See all solutions

Recommended explanations on Biology Textbooks

Cell Cycle

Read Explanation

Ecological Levels

Read Explanation

Microbiology

Read Explanation

Biological Structures

Read Explanation

Biological Processes

Read Explanation

Cell Communication

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.