Module 1: Nerves and Muscle
Group Case Study Assignment
The Doe family have been through a
hard time since Huntah died
(remember the octopus?) and John
tore his hamstring at the gym.
Luckily though, Oscar Doe (the
family’s trusty golden retriever) has
always had a smile on his face and
brought joy to the Doe clan despite
their recent misfortune. While John
was at home resting his hamstring
(and watching repeats of My Kitchen
Rules of course!), he noticed that
Oscar did not seem himself. Oscar
was struggling to walk (his hind
limbs fatigued very easily), he had to
attempt to swallow his food a
number of times in order to get it down (normally he woofs it down in 2
mins flat!), and his eyes were a bit droopy. Oscar still seemed happy,
but John knew something was not quite right and decided to investigate
using his new iPad Pro. According to Dr. Google, it sounded like Oscar
had Myasthenia Gravis (a disorder at the level of the synapse that can
affects both dogs and humans).
HBS2PTA Human Physiology Theory A 2017
Page 2 of 2
Q1. How is skeletal muscle contraction controlled in a normal healthy person (or
dog)? Describe synaptic transmission at the neuromuscular junction. Begin your
description with the arrival of an action potential at the pre-synaptic nerve
terminal and detail the events that occur up to and including the removal of
neurotransmitter from the synaptic cleft [3 marks].
Q2. Starting with Acetylcholine binding on the motor end plate, describe in detail
the process
by which a neural stimulus leads to muscle contraction (i.e. E-C coupling),
remembering to
include a description of the mechanisms underlying muscle relaxation. [3
Q2. Myasthenia gravis is an autoimmune disorder where the thymus gland
produces antibodies against the nicotinic acetylcholine receptor. How would this
lead to the symptoms Oscar is experiencing? [1mark].
Q3. Myasthenia gravis does not affect smooth muscle. Based on your knowledge of
smooth muscle regulation, why might this be the case? Include in your answer a
discussion of the differences between smooth and skeletal muscle in terms of
how the nervous system controls contraction [3 marks].
Q4. If an autoimmune condition existed in which the proteins that form gap
junctions were attacked by Oscar’s own antibodies, how would you expect this
to affect his smooth muscles? Would all types of smooth muscle in his body be
affected equally? What effect would this hypothetical condition have on his
skeletal muscles? [2 marks].

Why Choose Us

  • 100% non-plagiarized Papers
  • 24/7 /365 Service Available
  • Affordable Prices
  • Any Paper, Urgency, and Subject
  • Will complete your papers in 6 hours
  • On-time Delivery
  • Money-back and Privacy guarantees
  • Unlimited Amendments upon request
  • Satisfaction guarantee

How it Works

  • Click on the “Place Order” tab at the top menu or “Order Now” icon at the bottom and a new page will appear with an order form to be filled.
  • Fill in your paper’s requirements in the "PAPER DETAILS" section.
  • Fill in your paper’s academic level, deadline, and the required number of pages from the drop-down menus.
  • Click “CREATE ACCOUNT & SIGN IN” to enter your registration details and get an account with us for record-keeping and then, click on “PROCEED TO CHECKOUT” at the bottom of the page.
  • From there, the payment sections will show, follow the guided payment process and your order will be available for our writing team to work on it.