Page 188 - MEBİ YKS Denemeleri YDT İngilizce

YDT DENEMELERİ Ortaöğretim Genel Müdürlüğü 7. DENEME

42. It can be understood from the passage that starfish
41. - 43. soruları aşağıdaki parçaya göre cevaplayınız. limb regeneration ----.

A research team at Queen Mary University of London has A) is a recent discovery in the field of marine biology
made an exciting discovery about how starfish manage B) involves a number of complex biological processes
to survive predatory attacks by casting off their limbs to C) can only take place in a stress-free environment
escape—a process known as autotomy. This ability is D) happens faster when cholecystokinin levels increase
triggered by a neurohormone that is comparable to a human
E) is a physiological defence mechanism against
hormone called cholecystokinin. When starfish are under
stress, such as facing a predator, this hormone causes a predators
muscle at the base of their arm to contract, leading to the
limb detaching and, in turn, self-preservation. What makes
starfish truly remarkable is their capability to regenerate these
lost limbs over time. Understanding the precise mechanisms
behind this process could have considerable implications for
regenerative medicine, possibly helping scientists develop
new treatments for limb injuries in humans. By studying
how starfish perform this self-amputation and regrowth,
researchers hope to advance our understanding of tissue
regeneration, which could bring about some innovative
therapies for amputees.

41. According to the passage, the process of autotomy in 43. What is the primary focus of the research conducted
starfish is initiated by a ----. by Queen Mary University of London?
A) reaction to even the slightest changes in their A) To understand how starfish communicate with each
surroundings other under stress
B) muscle contraction that has nothing to do with B) To study the effects of environmental stressors like
hormones predatory attacks on starfish
C) unique genetic mutation that occurs when they feel C) To examine the mechanisms of limb detachment and
stressed regrowth in starfish
D) To investigate the neurohormones in starfish and their
D) natural reflex that appears without any particular
interaction with one another
trigger
E) To find ways that can aid in the development of new
E) specific neurohormone that acts like one found in
humans treatments for humans

188 YDT • İNGİLİZCE